Definition of IMPULSE

impulse

Plural: impulses

Noun

  • an instinctive motive
    • "profound religious impulses"
  • a sudden desire
    • "he bought it on an impulse"
  • the electrical discharge that travels along a nerve fiber
    • "they demonstrated the transmission of impulses from the cortex to the hypothalamus"
  • (electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
  • the act of applying force suddenly
    • "the impulse knocked him over"
  • an impelling force or strength
  • A thrust; a push; a sudden force that impels.
  • A wish or urge, particularly a sudden one prompting action.
  • The integral of force over time.

Verb

Verb Forms: impulsed, impulsing, impulses

  • To give impetus or a strong urge to; to drive forward.
  • To impel; to incite.

Examples

  • His desire to win would often impulse him to take risky, high-scoring words.
  • The impulse to learn drove me to study night and day.
  • The total impulse from the impact will depend on the kinetic energy of the projectile.
  • When I saw the new book, I couldn't resist the impulse to browse through it.

Origin / Etymology

Borrowed from Middle French impulser, from Latin impulsus.
For spelling, as in pulse, the -e (on -lse) is so the end is pronounced /ls/, rather than /lz/ as in pulls, and does not change the vowel (ā€˜u’). Compare else, false, convulse.

Synonyms

caprice, impetus, impulsion, momentum, nerve impulse, nervous impulse, neural impulse, pulsation, pulse, pulsing, urge, whim

Scrabble Score: 11

impulse: valid Scrabble (US) TWL Word
impulse: valid Scrabble Word in Merriam-Webster MW Dictionary
impulse: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 15

impulse: valid Words With Friends Word